Abstract

The appearances of fields that contain luminance discontinuities (e.g., the contour between a bright and a dark region) do not conform satisfactorily to predictions from models of spatial brightness interaction. Yet when the luminance distribution is systematically varied in regions separated by sharp contours, Mach-band-like gradients near the contours vary as predicted. A mechanism acting after spatial interaction may be important when fields contain contours.

© 1971 Optical Society of America

Symmetrical Appearance of Bright and Dark Mach Bands from an Exponential Illumination Gradient*

John A. Whiteside and Michael L. Davidson
J. Opt. Soc. Am. 61(7) 958-961 (1971)

Brightness Variations in Stimuli with Ramp-Like Contours*

James P. Thomas
J. Opt. Soc. Am. 56(2) 238-242 (1966)

Brightness Difference and Its Relation to the Distinctness of a Border*

Peter K. Kaiser and Thomas S. Greenspon
J. Opt. Soc. Am. 61(7) 962-965 (1971)

Simultaneously Recorded Retinal and Cortical Responses to Patterned Stimuli*

John C. Armington, Thomas R. Corwin, and Robert Marsetta
J. Opt. Soc. Am. 61(11) 1514-1521 (1971)

Visual-Perception Models

G. H. Kornfeld and W. R. Lawson
J. Opt. Soc. Am. 61(6) 811-820 (1971)